Murata MGJ1 Series: 5.7kVDC Isolated 1W SM Gate Drive DC-DC Converters

Product Overview

The MGJ1 series of DC-DC converters is ideal for powering 'high side' and 'low side' gate drive circuits for IGBTs, SiC, and MOSFETs in bridge circuits. A choice of asymmetric output voltages allows for optimum drive levels for best system efficiency. The MGJ1 series is characterized for high isolation requirements commonly seen in bridge circuits used in motor drives and inverters. The industrial grade temperature rating and construction provide long service life and reliability.

Features

• Patent protected
• Optimized bipolar output voltages for IGBT/SiC & MOSFET gate drives
• Reinforced insulation to UL62368-1 recognized
• ANSI/AAMI ES60601-1 2 MOPP recognized
• 5.7kVDC isolation test voltage ‘Hi Pot Test’
• Ultra low isolation capacitance
• Surface mount package style
• 5V, 12V, 15V & 24V inputs
• +15V/-3V, +15V/-5V, +15V/-9V & +19V/-5V outputs
• Operation to 105°C
• Short circuit protection
• Thermal protection
• Characterized partial discharge performance
• Characterized CMTI >200kV/µS
• Continuous barrier withstand voltage 3kVDC

Selection Guide

Selection Guide (Continued)

Technical Notes

Isolation Voltage

Terms like 'Hi Pot Test', 'Flash Tested', 'Withstand Voltage', 'Proof Voltage', 'Dielectric Withstand Voltage' & 'Isolation Test Voltage' all refer to the same concept: a test voltage applied for a specified time to verify the integrity of electrical isolation. Murata Power Solutions MGJ1 series DC-DC converters undergo 100% production testing at 5.7kVDC for 3 seconds and have been qualification tested at 5.7kVDC for 1 minute. The MGJ1 series is recognized by Underwriters Laboratory (UL). For applications where the insulation is not used as a safety barrier (i.e., provides functional isolation only), continuous or switched voltages up to 3kV across the barrier are sustainable. This is determined by measuring the partial discharge inception voltage according to IEC 60270. Contact Murata for more information.

Repeated High-Voltage Isolation Testing

Repeated high-voltage isolation testing can degrade isolation capability. It is advised to reduce the test voltage by 20% from the specified value if repeated testing is required.

Safety Approval

• ANSI/AAMI ES60601-1: Recognized by Underwriters Laboratory (UL) to ANSI/AAMI ES60601-1, providing 2 MOPP (Means Of Patient Protection) based on a working voltage of 250 Vrms between Primary and Secondary. The MGJ1D121503MPC is pending recognition.
• UL62368-1: Recognized by Underwriters Laboratory (UL) to UL62368-1 for reinforced insulation, with a working voltage of 250Vrms and a maximum operating temperature of 105°C. Creepage and clearance are 9mm.

Fusing

The MGJ1 Series converters are not internally fused. An anti-surge input line fuse, UL rated, should be used with ratings as follows:

• Input Voltage, 5V: 600mA
• Input Voltage, 12V: 250mA
• Input Voltage, 15V: 200mA
• Input Voltage, 24V: 125mA

RoHS Compliance, MSL, PSL and Reflow Soldering Information

This series is compatible with Pb-Free and Sn/Pb soldering systems. It meets J-STD-020 with a classification temperature of 260°C and moisture sensitivity level 2. The termination finish is Gold with 0.12 microns plating thickness. For more information, visit www.murata.com/en-global/products/power/rohs.

Environmental Validation Testing

The following tests have been conducted on this product series:

Part Number Structure

The part number structure is as follows: MGJ1DXX XXXX MPC-RXX

• Series name: MGJ1
• Power rating: D (Dual output)
• Output type: S (Single), D (Dual), T (Triple), Q (Quad)
• Input voltage: Specified by model number
• Output voltage: Specified by model number
• Packaging code: R7 (7-inch reel), R13 (13-inch reel)
• RoHS compliant: Indicated by 'MPC'
• Short circuit protection: Indicated by model number
• Package type: S (SIP), D (DIP), M (Surface mount), Z (ZIP)

Characterisation Test Methods

Ripple and noise measurements are performed with the following test configuration:

• C1: 1µF X7R multilayer ceramic capacitor (voltage rating ≥ 3x output voltage)
• C2: 10µF tantalum capacitor (voltage rating ≥ 1.5x output voltage, ESR < 100mΩ at 100 kHz)
• C3: 100nF multilayer ceramic capacitor, general purpose
• R1: 450Ω resistor, carbon film, ±1% tolerance
• R2: 50Ω termination
• T1: 3T of coax cable through a ferrite toroid
• RLOAD: Resistive load to maximum power rating. Connections via twisted wires.

Measured values are multiplied by 10 to obtain specified values.

Differential Mode Noise Test Schematic

A schematic diagram illustrates the test setup for differential mode noise measurement, including the DC/DC converter, oscilloscope, capacitors (C1, C2, C3), resistors (R1, R2), toroid (T1), and load (RLOAD).

Application Notes

Minimum Load

The minimum load for datasheet specification is 10% of the full rated load across the specified input voltage range. Loads below 10% may result in an increase in output voltage, potentially up to 1.25 times the specified output voltage if the output load falls below 5%.

Gate Drive Applications Advisory Note

For general guidance on product usage in gate drive applications, refer to the 'gate drive application notes'.

Capacitive Loading and Start-up

Typical start-up times for this series, with a 2.2µs input voltage rise time and 10µF output capacitance, are provided. The product series can start into capacitance up to 47µF (across +V to -V) or 100µF (across each output), with increased start times.

A graph shows a typical start-up waveform with CH1, CH2, and CH3 voltage levels and time scale.

Short Circuit Performance

The MGJ1D05XXXXMPC offers short circuit protection at low ambient temperatures (from -40°C up to specified temperatures shown in a graph). All other variants offer continuous short circuit protection.

External Zener Diode Network Circuit Options

The MGJ1 series is a dual output DC-DC converter designed for gate drive applications. It can be used as a general-purpose single output converter by loading from +Vout to -Vout.

The dual output is achieved using a zener voltage divider network. A 5V1 zener diode sets the -5V output, a 9V1 zener diode sets the -9Vout, and a 10V zener diode sets the -10Vout. A tolerance of 2% for these zener diodes should be considered. The 5V1 zener diode is rated at 300mW, while the 9V1 and 10V zener diodes are rated at 400mW.

Optional Configuration: For alternative negative output voltages, an external zener diode network can be connected across the main 20V or 24V output. Note that this bypasses the internal short circuit protection.

Two circuit diagrams illustrate optional configurations using external zener diode networks.

Schematics for Driving IGBT, SiC & MOSFET

Schematic diagrams are provided for driving IGBT, SiC, and MOSFET devices using the MGJ1 DC-DC converters. These diagrams show the connections for PWM drive, optocouplers, and the MGJ1 DC-DC converter outputs (+15V, -9V/-10V for IGBT; +19V, -5V for SiC; +15V, -5V for MOSFET).

Positive Output Voltage Tolerance Envelopes

These envelopes illustrate typical load regulation characteristics, showing the maximum output voltage variation due to changes in output loading and set point accuracy.

Graphs display the output voltage tolerance for various MGJ1 models across different output load currents.

Negative Output Voltage Tolerance Envelopes

These envelopes illustrate typical load regulation characteristics for negative outputs, showing the maximum output voltage variation due to changes in output loading and set point accuracy.

Graphs display the output voltage tolerance for various MGJ1 models across different output load currents.

Efficiency vs Load

Graphs show the efficiency of various MGJ1 models as a function of load percentage.

Temperature Derating

Graphs illustrate the derating of output load percentage based on temperature for different input voltage conditions for various MGJ1 models.

EMC Filtering and Spectra

An input capacitor and inductor are required to meet EN 55022 Curve B, Quasi-Peak EMC limit. The provided plots show adherence to positive and negative quasi-peak and CISPR22 Average Limit B (green line) and Quasi Peak Limit B (pink line) limits. Filter suitability should be evaluated in application. For high dv/dt above 80kV/µs from output to input, a common mode filter without Y capacitors is advised to reduce common mode current and interference with primary side circuits.

A table lists recommended inductor (L, µH) and capacitor (C, µF) values for various MGJ1 models, with options for SMD and Through Hole components.

Graphs display EMC filtering and spectra for different MGJ1 models, showing dBuV levels across frequency ranges.

Package Specifications

Mechanical Dimensions

Detailed mechanical dimensions are provided in millimeters, including PCB layout, pick-up points, pin configurations, and seating plane information. The weight is 2.3g.

Pin Connections

NA - Not Available for electrical connection.

Recommended Footprint Details

A recommended footprint for the component is provided, showing dimensions and pad layouts.

Tape & Reel Specifications

Reel Outline Dimensions

Diagrams show reel outline dimensions (Ø330 or Ø178) and reel packaging details, including leader, goods enclosure, and trailer sections.

Tape Outline Dimensions

Diagrams illustrate tape outline dimensions, showing pocket dimensions, cover tape, and direction of unreeling. Reel quantities are 80 pieces for a 7" reel and 400 pieces for a 13" reel.

Disclaimer

Murata Power Solutions products are designed for standard commercial and industrial applications and are NOT intended for safety-critical or life-critical applications. Use in such applications requires explicit written approval from Murata. Examples of applications where this disclaimer applies include aircraft equipment, aerospace equipment, medical equipment, transportation equipment, and power plant control equipment. Murata assumes no liability for unauthorized use of its products in safety-critical applications. Buyers are responsible for ensuring the suitability, fitness, and compatibility of Murata products for their specific applications and for implementing safeguards against potential failures.

Murata Power Solutions (Milton Keynes) Ltd. makes no representation that the use of its products will not infringe existing or future patent rights. Specifications are subject to change without notice.

This product is subject to specific operating requirements and the Life and Safety Critical Application Sales Policy. Refer to: https://www.murata.com/en-eu/products/power/requirements.